SimsVille - Cancelled almost at completion to focus efforts on The Sims 2 development.

SimMars - Was in development at Maxis around the same time as the release of The Sims.[1] A trailer for the game was included on the SimCity 3000CD-ROM. From the trailer, the premise of the game seemed to be a manned mission to the planet Mars, followed by a terraforming and colonization scenario, typical of the Maxis world-building game style. The game presumed to be an integration of previous Maxis titles, presented in 3D, possibly including elements of SimEarth, SimLife, and SimCity. On May 12, 2000, Maxis announced that the game was put on hold.[2] A reference and some sound effects were recycled into an arcade game in The Sims Vacation. The game was remade by fans as a complete total conversion mod for SimCity 4, and is in beta 3 phase.[3]

MySims Social - A game intended to launch on Facebook with The Sims Social and SimCity Social, it never was completed.

The Urbz 2 - A game intended to surpass The Urbz: Sims in the City, and turn it into a spinoff sub series to The Sims, but the project went through Development Hell after the original game failed to sell to expectations. It was in development first at Maxis for the PlayStation 2, Nintendo Gamecube and Xbox, before being sent over to Electronic Arts Chicago in 2006, where it had some design changes such as being moved to next generation platforms PlayStation 3, Xbox 360 and Nintendo Wii, but the project was cancelled when the studio closed on November 6, 2007, leaving the project incomplete and never released. Assets, logos and other content could be found on The Sims 2 for PlayStation 2's DVD with model viewers, as the game used the same source code and engine as The Urbz 2.[4]